Earth's orbit is getting crowded with junk. And that's becoming a major problem. Starting with Sputnik I in 1957, humanity has sent up nearly 17,000 satellites. Around 11,500 of them are still there, ...

Astronauts report smelling one particular scent upon returning from space.

Imagine stepping outside to stargaze on a clear summer night, only to see no stars but rather the garish glow of advertisements streaming across the sky. This seemingly science-fictional scenario ...

Add Yahoo as a preferred source to see more of our stories on Google. Paul M. Sutter talks about the science behind movies and TV shows set in space.

Lower gravity. Higher radiation. No ER access. These are just a few of the challenges that humans face in outer space. Emily and Regina talk to a NASA astronaut (and astronaut scientist) about the ...

On July 8, 1962, the United States detonated a 1.4-megaton nuclear weapon 400 kilometers above the Pacific Ocean. The Starfish Prime test created an artificial aurora visible from Hawaii, nearly 900 ...

Did you know nearly 17,500 satellites have been launched since 1957? Or what about the fact that more than 10% of those launches weren't registered internationally? While more and more orbital objects ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

Some materials used in aerospace applications such as polymers can degrade and erode with prolonged exposure to atomic oxygen, ultraviolet radiation, and extreme temperature cycling in the outer space ...